A teacher wishes to "curve" a test whose grades were normally distributed with a mean of 71 and standard deviation of 12. The top 15% of the class will get an A, the next 25% of the class will get a B, the next 30% of the class will get a C, the next 25% of the class will get a D and the bottom 5% of the class will get an F. Find the cutoff for each of these grades. (Round your answers to two decimal places.)

(a) The A cutoff is a (b) The B cutoff is a grade of (c) The C cutoff is a gr (d) The D cutoff is a grade of